diff --git a/terraform/environments/dev/variables.tf b/terraform/environments/dev/variables.tf
index d93ab19..d428375 100644
--- a/terraform/environments/dev/variables.tf
+++ b/terraform/environments/dev/variables.tf
@@ -45,7 +45,7 @@ variable "project_id" {
 variable "instance_type" {
   description = "type de l'instance"
   type = string
-  default = "e2_small"
+  default = "e2-small"
 }
 
 variable "zone" {